print("1+1=",1+1)
print("2-1=",2-1)
print("3*3=",3*3)
print("4/2=",4/2)
print("11//2=",11//2)
print("9%2=",9%2)
print("2**2=",2**2)
#还有复制运算符
num=1+2*3
print(num)

#+=
num=1
num+=1#num=num+1
print("num+=1",num)
num-=1
print("num-=1",num)
num*=4
print("num*=4",num)
num/=2
print("num/=2",num)
num=3
num%=2
print("num%=",num)
num**=2
print("num**2",num)

num=9
num//=2
print("num//2",num)